Has anyone seen one of these before if so who made it?

by Paul Kris
(Mt Calm TX USA)

Who made this compressor?

Who made this compressor?

Who made this compressor?

Who made this compressor?

Ive had this compressor a few years and have no idea who makes it,the cfm or anything other then it says made in the USA has a logo with and L and a sort of square around it model is e55A not really any other markings. I bought it from an auction and it was just the pump. didn't even have a flywheel the shaft for the flywheel i remember was 9/16 tapered down could not find a fly wheel to fit it so ended up making a taper bushing so i could use flywheel i had. i have it rigged on a 20 gal tank with wheels it pumps ok but would like to rebuild it just have no clue what it is. Any help would be appreciated. Oh i don't know for sure but it may have been dark blue in color. oh and of course the air intake filter isnt original that is off a Briggs and striation mower another weird thing about this pump it had two threaded holes that held filter housing in place i assume